September 2018 1 22 Report
Ustal wartościowość pierwiastków:

Cl2 O 7- te 2 i 7 maja byc male i siodenka kolo O.

Sn Cl2

K2 O

z2. Oblicz masy cząsteczkowe:

2 H2 S -te 2 przy H to ma byc male

Ne O3 - te 3 to ma byc male.

Pliss to na dzisiaj na 11 lub na 10:30.
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